@article{ref1,
title="Medial patellofemoral ligament injury in children: letter",
journal="American journal of sports medicine",
year="2011",
author="Balcarek, Peter",
volume="39",
number="6",
pages="NP6; author reply NP6-7",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0363-5465",
doi="10.1177/0363546511409657",
url="http://dx.doi.org/10.1177/0363546511409657"
}